<div class="ui-window-control fn-right">
  <a @click="tray" title="缩小到托盘区" href="javascript:;">
    <i class="icon-minimize-tray"></i>
  </a>
  <a @click="maximize" :title="isMaximized?'还原':'最大化'" href="javascript:;">
    <i :class="{ 'icon-maximize' : !isMaximized, 'icon-unmaximize' : isMaximized }"></i>
  </a>
  <a @click="close" title="关闭" href="javascript:;">
    <i class="icon-cross"></i>
  </a>
</div>